The study proposes a comprehensive methodology for improving the “center plate – thrust bearing” node, including the treatment of the surface of the thrust bearing by the method of electric spark alloying in I-40 industrial oil with a FUBAG tungsten electrode and the use of plastic lubricants containing effective additives that promote the formation of secondary structures on a metal counterbody. Tribological tests were carried out on a friction machine with 30X13 steel samples after processing by the method of electric spark alloying in the presence of PUMA-MR lubricant. A double calcium and zinc metaphosphate is used as an additive. Using experimental planning methods, the effect of the additive percentage and load-speed conditions on the wear rate was investigated. Optimization of the lubricant additive content made it possible to significantly increase the service life of the friction system under study.

The study considers the problem of determining the physico-mechanical and tribological parameters of ion-plasma DLC coatings applied to a steel substrate using nitrogen to stabilize the structure and thickness of coatings. The obtained dependences of the coefficient of friction µ and the run length L of the samples up to the moment of coating destruction by the current and induction coils (λ, A) – the power of the ion flux, the amount of stabilizer nitrogen (%N) allowed not only to optimize the coating modes, but also to identify the disadvantages of DLC coatings. In particular, it was found that the coefficient of friction remains practically constant and quite small over the entire range of loads at the level of µ = 0,17. As for wear, in the range of significant loads, the experimental dependence of the friction path to destruction continuously decreases and tends to zero. Therefore, further research was aimed at developing a technology for obtaining a combined coating by alternating CrAlSiN metal-ceramic layers obtained by arc spraying by physical vacuum deposition of PVD coatings, and carbon (including diamond-like) layers obtained by laser evaporation of graphite, without extracting substrate samples from the vacuum chamber of the BRV-600 installation. As a result of combining the high wear resistance of the CrAlSiN nitride coating and the low friction coefficient of the DLC coating, the wear resistance of highly loaded tribounits is significantly increased.

The article considers the main types of blanks of bodies of revolution in the form of a cap with implicit and explicit asymmetry and the proposed universal mechanical disk hopper loading device with teeth and an adjustable orientator for their automatic loading into the technological equipment of cartridge production. The study describes the main stages of designing a universal mechanical disk hopper loading device with teeth and an adjustable orientator, during which loading of blanks of various shapes and sizes will be implemented with the possibility of quick readjustment from one standard size to another, reliable operation during blank orientation will be ensured, the probability of blank capture by pockets of the universal hopper loading device will be increased in order to increase its productivity.

The article considers the application of a new matrix binder for an antifriction polymer composite coating. The coating being developed uses a reinforcing frame based on organic fibers, including polytetrafluoroethylene fibers (PTFE) and polyamide threads. A solution binder based on phenylone modified with fillers was chosen as an adhesive. In the study of multicomponent systems, such as composite materials, the problem of determining the effect of each component on the properties of the final product arises. To solve this problem, it is proposed to use simplex lattice plans. This ensures a fairly complete determination of the effect of each component on the resulting properties of the composite and allows obtaining more accurate and reliable results.

The traditional technology and main stages of cartridge manufacturing are considered. The study shows the necessity of using automatic loading systems with mechanical disk hopper loading devices for feeding with the required productivity and high reliability into automatic machines and cartridge production lines of piece blanks and finished products having the shape of bodies of revolution. A universal design of a mechanical disk hopper loading device with teeth and an adjustable orientator for blanks of bodies of revolution in the shape of a cap is presented. The operating principle and adjustment features of the proposed universal design when orienting blanks in the shape of a cap having different ratios of geometric parameters are considered.

The article proposes a method for generating program code based on the parameters of a neural network model. The necessity of developing this method to improve the performance of software and expand the possibilities of integration into systems with limited hardware resources is justified. The process of software synthesis is considered, including the creation of a direct pass code of a neural network based on the parameters of its model. Examples of code implementation for various configurations of neural networks, including networks with one and several outputs, are given. The results show the possibility of reducing time and resource costs when performing calculations in neural networks, which makes it possible to effectively use lowperformance equipment to perform tasks based on neural networks, which reduces equipment costs. The generated code can be easily integrated into various systems, including those with limited hardware resources. The methodology allows you to adapt and scale solutions to specific tasks and requirements, which is especially important for applied tasks in areas such as image and video processing, speech and text recognition, data analysis and forecasting.

The relevance of the study is due to the introduction of a unified train traffic control system on mainline railways based on microprocessor technologies. Track sensors play a significant role in the technical diagnostics systems of traction rolling stock. The Scientific and Innovation Center "Transport Safety" (SIC TS) of the Rostov State Transport University conducted a study of the parameters of the signal received when the wheel passes over magnetoinduction sensors; new sensor designs and the method of processing their signals make it possible not only to count the axles, but also to identify wheel defects. The analysis of signals modulated by a magnetoinduction sensor when a rolling stock wheelset passes over it, thanks to modern hardware and software complexes and the capabilities of graphical data presentation, can reflect the real picture of the profile of the wheelsets of a passing train, and also allows you to determine bogie distortions, the presence of dragging parts, critically overheated axle boxes. The article presents a graph-digital signal processing method for obtaining diagnostic information for monitoring the condition of wheels of railway rolling stock.

The work is devoted to the study of deformations of clayey soil samples, as well as the assessment of their accumulation for the conditions of application of multiple cyclic loads under axisymmetric loading conditions, simulating the operation of embankment soils under train effect. The studies were carried out for clayey soil samples in maximally compacted and underconsolidated states, as well as at soil moisture higher than optimal. The obtained dependences were extrapolated for the period of long-term operation by a function of three exponents. This methodology may be in demand when determining the consolidation time and the amount of accumulation of residual deformations of soil engineering structures subjected to cyclic loads and effects.

The paradigm shift in the functioning of the Russian transport and logistics mar- ket, caused by the reorientation of the main flows of goods movement to the "eastern" direc- tion, requires accelerated technological and infrastructural development of the transport sys- tem of the Far Eastern region. The railway infrastructure of the Eastern polygon is being mod- ernized to allow the declared volumes of cargo flow, while it is necessary to ensure efficient processing of vehicles and cargo at the facilities of the terminal and logistics infrastructure. The purpose of the work is to develop solutions aimed at increasing the processing capacity of the terminal and logistics infrastructure of railway transport by structurally optimizing the net- work of cargo terminals, consolidating cargo flows and organizing auxiliary damper terminals. The objectives of the study include the analysis of quantitative indicators of the terminal and warehouse complex of the Far Eastern Railway, a description of the characteristics and justi- fication of the organization of a damper terminal for the transfer of freight traffic. The subject of the study is the technological processes and infrastructural development of the terminal and logistics infrastructure of the Far Eastern Railway. Theoretical research methods are used in the work. The article is devoted to the issues of increasing the efficiency of functioning cargo terminals due to the redistribution of cargo flows between the objects of the terminal and lo- gistics infrastructure of railway transport. The method of choosing a cargo terminal for the transfer of cargo traffic in the presence of limiting factors is proposed.

In connection with the development of transport science on the principles of digitalization and intellectualization, measures are needed to improve the methodology for forming a network of nodal cargo distribution centers based on competitive economic and geographical principles of location, taking into account multi-agency transport services and its implementation through the development of adaptive algorithms and a software package. This makes it possible to process mass data and take into account the different-sized principles of block-modular design and zoning of the nodal territory. The article considers the development of an economic and geographical approach to delimiting the “zones of influence” of transport and warehouse facilities by optimizing the distribution of cargo flows according to the size of service areas and the number of clients, the use of higher-order algebraic curves in determining the configuration of warehouse service areas, and the formation of a modified geometric Euclidean model of the warehouse network, setting dependencies of transportation costs. To perform multivariate calculations, an original optimization algorithm based on integral calculus methods and a software package in the Maxima environment have been developed. Let's consider an example of the program's operation on the object of study – the logistics warehouse infrastructure of the transport hub "R". The effective locations of logistics distribution centers on the hub plan, their “zones of influence” and the attachment of consumers of warehouse services according to the criterion of minimum transport costs have been determined.

The article considers the method and technical devices for long-term maintenance of the temperature regime in a heated isothermal car intended for transportation of perishable food products. The article is a continuation of the authors' initiative research on the development of technical solutions for the type of isothermal cars and high-capacity containers. The proposed devices are considered together with the use of electric heating elements and a block of heat accumulators with a large equivalent heat capacity, provided by phasereversible reactions in the heat-accumulating material. The article presents analytical dependencies for calculating the phase transition parameters of some heat-accumulating materials, allowing to calculate the dimensions and select the type of heat accumulator best suited for use in the transportation of "thermally suitable" goods in a thermos car.

The wheelset is the main part of the car, its strength and durability are calculated using traditional methods. However, the issues of ensuring the durability of a wheelset during a given service life have been little studied in the theory of cars. In order to ensure the safe and efficient operation of wheel pairs of cars on the railway network, various requirements are imposed on them, which must first be confirmed by assessing strength and endurance indicators.
A method for calculating the probability of durability of a wheelset before reaching its limit state is proposed. The durability of the wheelset according to the fatigue endurance coefficient is determined based on the quantile, depending on the change in the stress difference. The study is made taking into account the main parameters of the mechanical properties of the wheelset (strength, geometric dimensions of the wheel pair, surface quality). The proposed method for calculating the durability of a wheelset can be applied as a progressive method to ensure the reliability of parts and units of cars, as well as other machines and mechanisms, which will increase the durability of the wheelset, as well as reduce the cost of maintenance and repair of wagons.

The process of functioning of an intelligent information and control system is represented by a semantic network of typical situations, each of which can be described by a semantic network of problem subsituations with corresponding optimization tasks. When the dynamics of the ongoing processes satisfies the Hamilton-Ostrogradsky principle, the synthesis of controls on the basis of the reduction of the Lagrange problem to an isoperimetric problem leads to a two-point boundary value problem, from which follows a set of quasi-optimal control structures. They can form the basis for the construction of a rule base. In this re-search paper, one of the variants of the control law is synthesized, where fuzzy logic is used to eliminate the uncertainty of the choice of its parameter according to the problem substitution. The constructiveness of the synthesized intelligent control law is demonstrated by the example of solving the problem of stabilizing the speed of a train with a single electric locomotive.

The article presents the results of the development of new scientifically based technical and technological solutions to reduce energy losses, increase energy supply, efficiency and stability of electric train traction by improving the conditions of interaction and technologies of operation of the traction power supply system and electric rolling stock to ensure the energy security of the transportation process on railway transport. The tasks of monitoring, assessing and forecasting the state of energy security have been solved; determining the resources necessary to prevent threats to energy security, which is the basis of the risk management system in the field of energy security of electric trains. The application of the obtained scientific provisions and methods makes it possible to determine the initial requirements for the development of technical specifications for the design of traction power supply systems that provide energy-efficient and sustainable power supply to train traction, to evaluate energy efficiency and adjust technical and technological solutions for energy-saving operation of traction substation equipment and electric rolling stock.

The article is devoted to the issues of using fiber-optic communication lines laid on the supports of the contact network as elements of the traction power supply system. The option of abandoning the use of dielectric cables of the OKSN type, currently used, and the transition to cables made of conductive material, in particular, to OKGT cables, is considered. The paper provides examples of using OKGT cables as part of existing traction networks to achieve the goals of increasing the energy efficiency of the transportation process. Among them, there is an example of organizing electrically compensated traction networks without laying additional conductors, increasing the reliability of the group grounding system of supports, as well as organizing a lightning protection contact network of a section of the railway.

The material of this article is devoted to the consideration of the influence of such indicators as the relative humidity of atmospheric air, the speed of movement of compressed air through the adsorber, the required purity class of compressed air in terms of moisture content in accordance with current regulatory documents, the porosity of the adsorbent on the energy consumption of technological processes of adsorption drying. The adsorbent alumogel, or rather its four most widely used industrial modifications, was chosen as the object of research. The article presents the results of research to determine the energy efficiency of each of the four selected modifications of alumogel. Based on the analysis of the results obtained, conclusions and suggestions are formulated, and the practical significance of the research is indicated.